工作中记录一 list转树

若后端传回如下数据

 [{name:'一级目录',id:'1',parentId:'0'},{name:'一级目录',id:'2',parentId:'0'},{name:'二级目录',id:'3',parentId:'1'},{name:'二级目录',id:'4',parentId:'2'},{name:'三级目录',id:'5',parentId:'3'}]

你要将其转为tree的结构。如何做呢？

	function toTree(data,pid){
		let res=[],temp;
		for(var i in data){
			if(data[i].parentId == pid){
				res.push(data[i])
				temp = toTree(data,data[i].id);
				if(temp.length>0){
					data[i].children=temp
				}
			}
		}
		
		return res;
	}
	console.log(toTree(list,0))